"Ladies and gentlemen, I drafted an outline of what I think the Constitutional limits [garbled] have on the President with the War Clause. I went to five leading scholars, Constitutional scholars, and they drafted a treatise for me that is being distributed to every Senator. And I want to make it clear, and I’ll make it clear to the President: that if he takes this nation to war in Iran, without Congressional approval, I will make it my business to impeach him," - then Senator Joe Biden.
It's not a slam-dunk. War on Iran would have been a far bigger deal than the current war in Libya, with far wider and more traumatic global repercussions. But of course, we don't fully know yet what the consequences of the Libyan intervention will be. I remain of the view that, whatever the War Powers Act says, the Constitution clearly vests the power to go to war with the Congress, not the president. We need a Congressional debate and vote ASAP.